Analyses of Microstructural Properties of VA/VeoVA Copolymer Modified Cement Pastes A R T I G O T É C N I C O C I E N T Í F I C O.
|
|
- Tracy Matthews
- 6 years ago
- Views:
Transcription
1 ntroduction Analyses of Microstructural Properties of VA/VeoVA opolymer Modified ement Pastes The polymer application in Portland cement composites is not new and the concept of polymer modification has been researched for the past 75 years or more. n the last 30 years, several publications have shown the benefit of polymer addition in the properties of the Portland cement composite such as strength, deformability, adhesion, waterproofness and durability [1-3]. There are several kinds of polymeric compounds for applications in concretes such as polymer latex, redispersible polymer powder, water-soluble polymer and liquid polymer [-4]. Because of the easy application [3], the redispersible polymers are commonly used in the composites, such as the poly(ethylene-vinyl acetate) EVA, poly(styreneacrylic ester) SAE, the polyacrylic ester - PAE and poly(vinyl acetate-vinyl versatate) VA/VeoVA. To understand the interference of polymer modification in the formation of some phases of Portland cement composite, several techniques have been adopted such as scanning electronic microscopy, Fourier transform infrared spectroscopy and the thermogravimetric analysis, which is also used in several studies to determine the amount of the pozzolanic reaction and the hydration of cement pastes by quantifying a(oh) content and calcium hydrates content. FT-R is one of the powerful techniques normally used for molecular characterization. Recently, FT-R has been found to be very useful in delineating the complex chemistry arlos Eduardo M. Gomes nterunidades em iência e Engenharia de Materiais, USP involved in the hydration of cement. n particular, the FT-R results have been used to resolve the hydroxyl bands, to understand the degree of silicate polymerization occurring, and to monitor the dynamics of changes in the sulfate region during hydration reaction. Also, the effect of atmospheric carbon dioxide on hydration has been characterized [5]. n this way, this work reports results of investigations in which methods of thermal analysis and FT-R were applied to evaluate the effects of copolymer modification on the hydration process and the possible interaction between copolymer and Portland cement respectively. n addition, analysis of PM was also applied. State-of-art review Osny P. Ferreira Escola de Engenharia de São arlos, USP Abstract: Recently, modern techniques have been applied for analysis of the influence of polymers on microstructural properties of Portland cement, such as Thermogravimetric Analyses (TG), Scanning Electronic Microscopy (SEM), Fourier Transform nfrared Spectroscopy (FT-R) and Mercury ntrusion Porosimetry (MP). n this study, thermogravimetric analyses were used to study the influence of vinyl acetate-versatic vinylester copolymer (VA/VeoVA) in seven pastes of 8-day old Portland cement, in which distinct polymer contents and water/cement ratios were employed. n addition, analyses of FT-R and MP on Portland cement pastes modified by the copolymer were employed. The results showed that the addition of polymer interferes significantly in the reduction of Portlandite formation and increases the porosity of the matrices. A possible chemical interaction between the copolymer and hydrated products of Portland cement was also observed. Keywords: ement paste, modified mortars, VA/VeoVA copolymer. Polymer olymer-based Admixtures es The concept of polymer modification is not new and the first patent was obtained in 193. This patent refers to the use of cement as filler in a polymer matrix. n 194, the first patent was published using the concept of polymer modification for cement mortar and concrete [,4,6]. Basically, there are three kinds of polymer-based admixtures also called cement modifiers: polymer-modified mortar (PMM); polymer mortar (PM); and polymerimpregnated mortar (PM) and concrete (P). The first P was produced by impregnating hydrated Portland cement concrete with a low viscosity monomer, such as methyl methacrylate, which was subsequently Autor para correspondência: arlos Eduardo M. Gomes, Laboratório de onstrução ivil, L - USP, Avenida do Trabalhador São-carlense 400, EP: , São arlos, SP. marmorato@itelefonica.com.br. A R T G O T É N O E N T Í F O Polímeros: iência e Tecnologia, vol. 15, n 3, p ,
2 polymerized by radiation or thermal catalytic techniques. However, at present, apparently its use is not very common. P consists of aggregate with a polymer binder and contains no Portland cement or water. Polyester-styrene, acrylics and epoxies have been the most widely used monomers/resins, but vinyl ester, furan, and urethane, have also been used. PMM consists of Portland cement mortar with a polymer modifier such as acrylic or styrene-butadiene latex (SB), polyvinyl acetate, ethylne vinyl acetate, and polyvinyl acetatevinyl versatate (VA/VeoVA). n general, these polymers for use in the mortars and concretes can be classified into four main types: polymer latex (dispersion), redispersible polymer powder; water-soluble polymer and liquid polymer. Redispersible polymer powders are manufactured by a twostep process. Firstly, polymer latexes as raw materials are made by emulsion polymerization, and are spray-dried to obtain the polymer-powders. Before spray-drying, the latexes are further formulated with some ingredients such as bactericides, spray-drying aids and antifoaming agents. Anti-blocking aids such as clay silica and calcium carbonate are added to the polymer powders during or after spray-drying to prevent caking of the polymer powders during storage. Water-soluble polymers as polymer-based admixtures are water-soluble powdered polymers, such as cellulose derivatives, polyvinyl alcohol, polyacrylamide, etc; they are added in the form of powders or aqueous solutions to the cement mortar or concrete during mixing. Liquid polymers as polymer-based admixtures are viscous polymeric liquids such as epoxy resin and unsaturated polyester resin, and are added with hardener or catalyst, and accelerator to cement mortar or concrete during mixing. Polymer Modification As a principle of polymer modification, it is very important that both Portland cement hydration and polymer film formation proceed well in order to produce a monolithic matrix phase with a network structure in which the cement hydrate phase and polymer phase interpenetrate. The modification with redispersible polymer powders (as the modification with VA/VeoVA used in this study) is similar to that of latex formation except that it also involves the redispersion of polymer powders. n these cases, the modification is governed by both Portland cement hydration and polymer film formation processes in their binding phase. The cement hydration process generally precedes the polymer film formation by coalescence of polymer particles. nteraction between Polymer and Portland ement Hydration There are two theories for the mechanism of action of polymers in mortars and concretes. According to the first theory there is no interaction between the polymer and concrete. During hydration the hydrophilic part of the polymer is oriented towards the water phase whereas the hydrophobic part heads towards the air phase (pores and capillaries not pilled with water). Upon drying, the water is taken away, the hydrophobic particles coalesce together and form film. The other theory is that some chemical reactions may take place between the particle surfaces of reactive polymers (such as polyacrylic esters (PAE) and calcium ions a + ), a(oh) and solid surfaces or silicate surfaces over the aggregates. This creates a type of reinforcement in the concrete and that will produces semipermeable membranes [1]. The importance of the Thermal Analyses Thermal analysis is the term used to identify a group of methods and techniques in which a physical property of a substance is measured as a function of temperature. Thermogravimetry (TG) and derivative thermogravimetry (DTG) have proven to be valuable tool for evaluating the nature of hydration products according to different stages of cement hydration, as well as quantify the different phases [1,6-9]. When cement is hydrated its main components are transformed into hydration products, mainly calcium silicate hydrates (-S-H gel) and Portlandite. The hydration rate of cement can be evaluated by measuring the mass loss of hydrated compounds up to 800. Some DTG peaks or temperature range have been reported when hydrated cement is heated in thermobalance [7] : 100 : dehydration of pore water o : different stages of -S-H dehydration ~500 : dehydroxylation of a(oh) ~700 : decarbonation of ao 3 As explained above, polymer modification reduces the quantity of a(oh) formed in the mortars [10]. This work reports results of investigations in which methods of thermal analysis were applied to evaluate the effects of polymer modification on the hydration process of Portland cement by estimating a(oh) content and calcium hydrates content. Experimental Materials The materials employed for paste preparation were highearly-strength Portland cement (P-V type according to Brazilian standards NBR-5733 and NBR-5737) and redispersible polymer VA/VeoVA. haracteristics of these materials are shown in Tables 1 and. Methods The range was formed by four pastes with different polymer content (A-0%; B-10%; -0% e D-40%) and the same water/cement ratio, and the other three (E-10%; F-0% e G-40%) with extra water content increased by polymer content. The following procedure was employed for the mixing of pastes: (i) dry mixing of Va/VeoVa and cement in low-speed mechanical mixer; (ii) dry mixing flowing over water plus superplasticizer; (iii) paste mixing in low-speed mechanical mixer for 180 s; (vi) casting in hermetic cylindrical flasks; 194 Polímeros: iência e Tecnologia, vol. 15, n 3, p , 005
3 Table 1. hemical analyses of Portland cement Four chemical analyses of high-early-strength Portland cement (%) SiO 19,55 19,40 19,47 19,64 Al O 3 4,98 5,00 5,04 5,09 Fe O 3 3,08 3,00 3,01 3,00 ao 64,84 64,68 64,66 64,85 MgO 0,60 0,65 0,59 0,63 SO 3,86,81,86,88 O,50,50,05 1,98 K O 0,70 0,71 0,70 0,69 Table 3. Mixture proportions Pastes ement additional copolymer content (%) W/ ratio water/(copolymer+ cement) ratio A 1 0 0,35 B , ,35 D ,35 E ,35 F 1 0 0,35 G ,35 P.F.,93 3,04,78,68 Residue 0,31 0,8 0,5 0,3 Table. Physical characteristics of VA/VeoVA copolymer Physical analyses Solids content (%) 99 ± 1 Anti-blocking content (%) 1 ± Apparent density (g/cm 3 ) 0,45 to 0,60 Particle size (µm) 80 ± 10 (v) demoulding 4 h after casting; (vi) dry cure was maintained at 75% relative humidity (RH) up to 7 days old; (vii) preparation for analyses on 8 th day. The preparation for TG was realized using agate crucible where the paste was triturated until particles size lower than 0,074 mm. The analyses were realized using the thermal analyzer TGA 951. The experimental conditions were: air dynamic atmosphere (100 ml/min); heating rate (10 min -1 ); platinum top-opened crucible; and specimens of approximately 7 mg. FT-R analyses were realized in the BOMEM FT-R model MB-10 equipment, using KBr pallets in the proportion 1mg of specimen:100mg of KBr, spectra range of 4000 cm -1 until 300 cm -1 and bands intensities expressed in transmittance (%T). To verify the porosity, the pastes A, B,, and D were cut with a diamond saw at 8 days old, making cubes of edge equal to 10±1mm. Before analyses, the specimens were immersed in iso-propyl alcohol, cleaned by ultrasonic equipment and dried in vacuum for 4 hours. All the analyses were realized in a PoreSizer 930 equipment. Results and Discussion Table 3 shows the mixture proportions analyzed. Figures 1 and show the thermogravimetric analyses whose results are shown in the Table 4. Figure 1. nfluence of Va/VeoVA content in the Portland cement paste Figure. nfluence of Va/VeoVA (with extra water content) in the Portland cement paste Figure 3 and Table 5 show the porosity of the matrices in terms of accumulated volume versus average pore. As seen in the Figures 1 and, the presence of VA/VeoVa copolymer interferes in the behavior of the hydroxide calcium and its content (Table 4). onsidering the weight loss in the Polímeros: iência e Tecnologia, vol. 15, n 3, p ,
4 Table 4. Results of the thermogravimetric analyses Mixture Dehydration and decomposition of the -S-H* 5 º ~ 00 º Weight loss from polymer pyrolysis** 00 º ~ 400 º Decomposition of the a(oh) (Portlandite) 400 º ~ 500 º Decomposition f the ao o ~ 750 Decomposition of the carbonate phases*** 700 º ~ 850 º Residue Above 850 A 6,540 % 0 %,98 % 6,43 % 81,56 % B 8,13 % 5,077 %,005 % 6,318 % 1,545 % 76,87 % 5,8 % 9,608 %,075 % 6,690 %,141 % 73,67 % D 4,499 % 17,81 % 1,364 % 6,689 % 65,78 % E 7,965 % 4,993 %,64 % 6,146 %,381 % 75,67 % F 9,107 % 8,863 % 1,965 % 8,119 % 3,90 % 68,78 % G 8,770 % 15,96 % 1,650 % 7,715 % 1,854 % 64,07 % *calcium silicate hydrate ** acetate group elimination ***different crystalline compounds react with a++ ion from S and 3 S hydration and form an organic salt (calcium acetate). Some evidence of this chemical interaction is also detailed in FT-R analyses. n this way, the decrease of portlandite formation in the cement pastes can also be attributed to chemical interaction between VA/VeoVA and cement paste. The formation of calcium acetate increases the loss weight of the carbonate phases as shown below: Figure 3. Accumulated volume (%) versus Pore diameter (µm) Table 5. Results of porosimetry Properties Apparent density ( g/cm 3 ) Paste A Paste graphs it is to be noted that the quantity of a(oh) is less than that unmodified mortar and it is gradually decreased along with the increase of the polymer content. These results are in line with those shown by the studies of reference 10, which employed similar proceedings. The decrease of portlandite formation by addition of the cement modifiers can be both the consequence of lower cement hydration and a possible chemical interaction between groups from alkaline hydrolyses of polymers and hydration products of portland cement [1,9,10]. As shown in reference [13], some polymers that contain vinyl acetate group can suffer hydrolysis when dispersed in alkaline medium. The product of this hydrolysis is the acetate anion (H 3 OO) -, which can B Paste Paste D Real density (g/cm 3 ) Total porosity (%) Average pore (µm) This was not clearly observed in the results because of specimens carbonation and the lower degeneration of VeoVA based copolymers in alkaline environment. Some polymers may reduce the hydration at early ages, in this way, the reduction of calcium hydroxide appears to be more related to lower cement hydration. As previously illustred, the analyses of pastes E, F and G with extra water content showed a major quantity of a(oh) when compared with pastes B, and D respectively. t is evident that the addition of the cement modifier reduces the calcium hydroxide formation and interferes in other important phases. However, the magnitude of this influence and reduction in the quantity of a(oh) showed to be directly affected by the polymer/cement and water/ cement ratio. Moreover, it is possible the reduction of portlandite by its reaction with the O from the polymer oxidation during TG analysis is possible. Regardless the presence of VA/VeoVA in the pastes, the following bands it could be observed on the FT-R spectrum: calcium hydroxide bands (364 cm -1 ), combined and absorbed water of -S-H, Afm, and Aft, phases ( cm -1 ), molecular water ( and cm -1 ), carbonate phases ( , and cm -1 ), sulphates phases ( cm -1 ), anhydrous calcium silicates (90, and cm -1 ) and calcium silicates ( cm -1 ). 196 Polímeros: iência e Tecnologia, vol. 15, n 3, p , 005
5 Figure 4. FT-R spectrums of pastes A, B, and D (w/c = 0.35) Figure 5. FT-R spectrums of pastes A, E, F and G (w/(c+cop.) = 0.35) Although in the spectrums of Figures 4 and 5 it was possible to observe the infrared bands at ( cm -1 ), which are characteristics of carboxylate anion from partial hydrolysis of the vinyl acetate group, as previously written, the loss weight was not significant in the TG analyses and it could not be measured. These results were attributed to lower degeneration of VeoVA based copolymers in an alkaline environment rather than other copolymers that contain the vinyl acetate group. The porosimetry analyses showed that the addition of VA/ VeoVA increase the porosity of the matrices substantially. These results are due to the air incorporated during the mixing process. Although the use of copolymer increased the air Polímeros: iência e Tecnologia, vol. 15, n 3, p ,
6 incorporated content, there was a reduction of the average pore diameter in the matrices. onclusions The TG curves obtained showed typical aspects of the Portland cement mortar modified by polymer. All curves showed the phenomena of the vaporization of the free water and decomposition of -S-H from about 5 to 00. The weight loss between 400 and 500 are due to the decomposition of Portlandite. The decomposition of carbonate phases had occurred at about 500 and 850, being the phenomena of this enlargement attributed to weight loss of different crystalline compounds. VA/VeoVA copolymer does not cause important modifications in the spectral profile of modified pastes, except for the possible interaction between copolymer and portland cement. These results were attributed to lower degeneration of VeoVA based copolymers in an alkaline environment rather than other copolymers that contain the vinyl acetate group. The addition of VA/VeoVA copolymer strongly reduces the Portlandite formation, being this result attributed principally to lower Portland cement hydration. oncerning porosimetry, it was observed that the air incorpored content of modified pastes is higher than the one in unmodified pastes. The lowest average pore diameter was also observed for modified pastes. Due to lower density of VA/VeoVA copolymer, the pastes showed a decrease of the real and apparent density in comparison with unmodified mortars. Acknowledgments The authors acknowledge the support of Rhodia Group, The nstitute of hemistry of São arlos and The nstitute of Physics of São arlos, University of São Paulo, where the analyses were carried out. References 1. handra, S & Flodin, P. - ement oncrete Research, vol.17, p (1990).. Ohama, Y. - oncrete omposites, vol.0, p (1998). 3. Ohama, Y. - Advn. ement Bas. Materials, v.5, p (1997). 4. Fowler, D. W. - ement and oncrete omposites, vol.1, p (1999). 5. Mollah, M. Y. A. et al. - ement and oncrete Research, vol. 30, pp (000). 6. Dweck, J. et al. - Thermochimica Acta 346, p (000). 7. Fordham,. J.; Smalley,. J. - ement and concrete research, vol. 15, p (1985). 8. Ollitrault-Fichet, R. et al. - ement and oncrete Research, vol 8, n1, pp (1998). 9. Tisivilis, S. et al. Journal of thermal analysis, vol. 5, p (1998). 10. Afrid et al. - nternational Journal of ement omposites and Lightweight oncrete, vol. 11, n.4, p (1989). 11. Kriegel, R. et al. - Proceedings of the 11 th nternational ongress on the hemistry of ement (), pp (003). 1. Fordham,. J.; Smalley,. J. ement and concrete research, vol. 15, p (1985). 13. Silva, D. A. et al. - ement and oncrete Research, vol.079, pp.1-8 (00). Enviado: 31/08/04 Reenviado: 04/0/05 Aprovado: 10/03/ Polímeros: iência e Tecnologia, vol. 15, n 3, p , 005
Studies on Furan Polymer Concrete
Studies on Furan Polymer Concrete Rajesh Katiyar 1, Shobhit Shukla 2 1Associate Professor, Department of Chemical engineering, H.B.T.U., Kanpur-208002, India 2Research Scholar, Department of Chemical engineering
More informationCOMPARISON OF SOLVENT EXCHANGE AND VACUUM DRYING TECHNIQUES TO REMOVE FREE WATER FROM EARLY AGE CEMENT-BASED MATERIALS
COMPARSON OF SOLENT EXCHANGE AND ACUUM DRYNG TECHNQUES TO REMOE FREE WATER FROM EARLY AGE CEMENT-BASED MATERALS E. Knapen, O. Cizer, K. an Balen and D. an Gemert Department of Civil Engineering, K.U.Leuven,
More informationEvaluation of Chemical Resistance of Polymer Concrete in Corrosive Environments
Iranica Journal of Energy & Environment 4 {(3) Geo-hazards and Civil Engineering)}: 300-306, 2013 ISSN 2079-2115 IJEE an Official Peer Reviewed Journal of Babol Noshirvani University of Technology DOI:
More informationPolímeros: Ciência e Tecnologia ISSN: Associação Brasileira de Polímeros Brasil
Polímeros: iência e Tecnologia SSN: 0104-1428 abpol@abpol.org.br Associação Brasileira de Polímeros Brasil Filho Nascimento, Antonio P.; Silva, Maria L. P.; Demarquette, Nicole R. Polymer production by
More informationA Glossary of Terms Used in the Adhesives, Coatings and Elastomers (ACE) Sector
A Glossary of Terms Used in the Adhesives, Coatings and Elastomers (ACE) Sector Abrasion resistance The ability of the coating membrane to resist mechanical action such as foot traffic and particles, which
More informationSPECIALTY MONOMERS FOR ENHANCED FUNCTIONALITY IN EMULSION POLYMERIZATION
SPECIALTY MONOMERS FOR ENHANCED FUNCTIONALITY IN EMULSION POLYMERIZATION Pierre Hennaux, Nemesio Martinez-Castro, Jose P. Ruiz, Zhihua Zhang and Michael D. Rhodes Solvay Inc. Centre for Research & Technology-
More informationInstitute for Inorganic Chemistry, Technische Universität München, Lichtenbergstr. 4, Garching, Germany a
Advanced Materials Research Online: 2013-04-24 ISSN: 1662-8985, Vol. 687, pp 322-328 doi:10.4028/www.scientific.net/amr.687.322 2013 Trans Tech Publications, Switzerland Effect of Ca 2+ Ions on the Film
More informationEvolved gas analysis by simultaneous thermogravimetric differential thermal analysis-fourier transformation infrared spectroscopy (TG-DTA-FTIR)
Technical articles Evolved gas analysis by simultaneous thermogravimetric differential thermal analysis-fourier transformation infrared spectroscopy (TG-DTA-FTIR) Tadashi Arii* 1. Introduction Simultaneous
More informationVINYL ACETATE-ETHYLENE (VAE) DISPERSIONS PROVIDE HIGH PERFORMANCE VERSATILE BINDERS FOR A VARIETY OF COATINGS APPLICATIONS
VINYL ACETATE-ETYLENE (VAE) DISPERSIONS PROVIDE IG PERFORMANCE VERSATILE BINDERS FOR A VARIETY OF COATINGS APPLICATIONS Authors: Kevin Merlo, Ricardo Gouvea, Angelita Saul, and Markus Busold Wacker Chemical
More informationIMPROVING DURABILITY OF THE FINISHES BY THE FILM-FORMING PRODUCTS IN AQUEOUS DISPERSION WHEN VARYING THE POLYMERIC BINDERS
U.P.B. Sci. Bull., Series B, Vol. 77, Iss. 1, 2015 ISSN 1454-2331 IMPROVING DURABILITY OF THE FINISHES BY THE FILM-FORMING PRODUCTS IN AQUEOUS DISPERSION WHEN VARYING THE POLYMERIC BINDERS Mirela LAZĂR
More informationMarine bio-inspired underwater contact adhesion
Marine bio-inspired underwater contact adhesion Sean K. Clancy, Antonio Sodano, Dylan J. Cunningham, Sharon S. Huang, Piotr J. Zalicki, Seunghan Shin, * and B. Kollbe Ahn * Marine Science Institute, University
More informationDetermination of Kind of Cement in Hardened Concrete by Electron Probe Microanalyser
Determination of Kind of ement in Hardened oncrete by Electron Probe Microanalyser Daisuke Sawaki 1,*, Haruka Takahashi 1 and Etsuo Sakai 2 1 Taiheiyo onsultant o.,ltd., Japan 2 Tokyo Institute of Technology,
More informationNano-modification of Building Materials for Sustainable Construction
Nano-modification of Building Materials for Sustainable Construction M. Kutschera, T. Breiner, H. Wiese, M. Leitl, and M. Bräu 1 Abstract. Nanostructured products or products which were developed by means
More informationPerformance of Concrete Containing Zeolite As a Supplementary Cementitious Material
Volume: 04 Issue: 12 Dec2017 Performance of Concrete Containing Zeolite As a Supplementary Cementitious Material Esraa Emam1, Sameh Yehia2 1Associate Professor, Building Materials Research and Quality
More informationNano-silica production by a sustainable process; application in building materials.
Nano-silica production by a sustainable process; application in building materials. A. LÁZARO AND H. J. H. BROUWERS Department of Architecture, Building and Planning Unit of Building Physics and Systems,
More informationAPPLICATION OF THERMAL METHODS IN THE CHEMISTRY OF CEMENT: KINETIC ANALYSIS OF PORTLANDITE FROM NON- ISOTHERMAL THERMOGRAVIMETRC DATA
The First International Proficiency Testing Conference Sinaia, România 11 th 13 th October, 2007 APPLICATION OF THERMAL METHODS IN THE CHEMISTRY OF CEMENT: KINETIC ANALYSIS OF PORTLANDITE FROM NON- ISOTHERMAL
More informationPOLYVINYL ALCOHOL. SYNONYMS Vinyl alcohol polymer, PVOH, INS No DEFINITION DESCRIPTION FUNCTIONAL USES CHARACTERISTICS
POLYVINYL ALCOHOL New specifications prepared at the 61 st JECFA (2003) and published in FNP 52 Add 11 (2003). An ADI of 50 mg/kg bw was established at 61 st JECFA (2003). SYNONYMS Vinyl alcohol polymer,
More information*EP A1* EP A1 (19) (11) EP A1 (12) EUROPEAN PATENT APPLICATION. (43) Date of publication: Bulletin 2004/06
(19) Europäisches Patentamt European Patent Office Office européen des brevets *EP001386939A1* (11) EP 1 386 939 A1 (12) EUROPEAN PATENT APPLICATION (43) Date of publication: 04.02.04 Bulletin 04/06 (1)
More informationHeavy Metal Desorption From Cement Hydrates Caused by Chloride Solutions
4 th International Conference on the Durability of Concrete Structures 24 26 July 2014 Purdue University, West Lafayette, IN, USA Heavy Metal Desorption From Cement Hydrates Caused by Chloride Solutions
More informationLiquid Polybutadienes and Derivatives
Liquid Polybutadienes and Derivatives Coatings & Colorants Product Range Our polyoils and derivatives are stereospecific, lowviscosity and unsaponifiable liquid polybutadienes having a high 1.4-cis double
More informationChemical interaction between polymer and cement in polymer-cement concrete
BULLETIN OF THE POLISH ACADEMY OF SCIENCES TECHNICAL SCIENCES, Vol. 64, No. 4, 2016 DOI: 10.1515/bpasts-2016-0087 CIVIL ENGINEERING Chemical interaction between polymer and cement in polymer-cement concrete
More informationADDITIVES. HIGH SOLIDS AND WATER- BORNE COATINGS Werner J. Blank Rudy Berndlmaier & Dan Miller King Industries Inc.
You are now at www.wernerblank.com HOME NEWS PUBLICATIONS LECTURES PATENTS DOWNLOADS ADDITIVES FOR HIGH SOLIDS AND WATER- BORNE COATINGS Werner J. Blank Rudy Berndlmaier & Dan Miller King Industries Inc.
More informationSupporting Information
Supporting Information 1. Microcapsules characterization 1.1. Thermogravimetric analysis (TGA) Thermal degradation in air and nitrogen of the synthesized microcapsules is shown in figure S1. 100 Weight
More informationIMPROVEMENT OF HARDENED CONCRETE DURABILITY BY NANOSILICA ELECTROMIGRATION
IMPROVEMENT OF HARDENED CONCRETE DURABILITY BY NANOSILICA ELECTROMIGRATION M. Sánchez-Moreno 1, M. C. Alonso 1, I Diaz 2 and R. González 2 1 Research Centre on Safety and Durability of Structures and Materials,
More information2. Amorphous or Crystalline Structurally, polymers in the solid state may be amorphous or crystalline. When polymers are cooled from the molten state
2. Amorphous or Crystalline Structurally, polymers in the solid state may be amorphous or crystalline. When polymers are cooled from the molten state or concentrated from the solution, molecules are often
More informationTechnology offer: Environmentally friendly holographic recording material
Technology offer: Environmentally friendly holographic recording material Technology offer: Environmentally friendly holographic recording material SUMMARY Our research group has developed a new photopolymer
More informationDOWNLOAD PDF WETTING KINETICS AND POLYPROPYLENE-ALUMINUM BOND STRENGTH
Chapter 1 : Metal oxide adhesion - Wikipedia The research accomplishments for this three-year metal matrix composite research program centered upon three areas: infiltration kinetics, wettability studies
More informationEffects of Curing Temperature and MMA Content on the Working Life of MMA-Modified Vinyl Ester Polymer Concrete
American Journal of Applied Sciences Original Research Paper Effects of Curing Temperature and MMA Content on the Working Life of MMA-Modified Vinyl Ester Polymer Concrete 1 Ki-Bong Choi, 2 Seung-Ho Min
More informationAvailable online at ScienceDirect. Procedia Materials Science 11 (2015 )
Available online at www.sciencedirect.com ScienceDirect Procedia Materials Science 11 (2015 ) 594 599 5th International Biennial Conference on Ultrafine Grained and Nanostructured Materials, UFGNSM15 Investigation
More informationInfrared Spectroscopy
Infrared Spectroscopy IR Spectroscopy Used to identify organic compounds IR spectroscopy provides a 100% identification if the spectrum is matched. If not, IR at least provides information about the types
More informationProduction of Trowel Paints using Polyvinyl Acetate Synthesized from Vinyl Acetate Monomer as a Binder
Leonardo Journal of Sciences ISSN 1583-0233 Issue 19, July-December 2011 p. 49-56 Production of Trowel Paints using Polyvinyl Acetate Synthesized from Vinyl Acetate Monomer as a Binder Department of Chemical
More informationAlain Dufresne. Nanocellulose. From Nature to High Performance Tailored Materials OE GRUYTER
Alain Dufresne Nanocellulose From Nature to High Performance Tailored Materials OE GRUYTER Contents Preface - vii 1 Cellulose and potential reinforcement-1 1.1 Polysaccharides-1 1.2 Chemical structure
More informationElectronic materials and components-polymer types
Introduction Electronic materials and components-polymer types Polymer science is a broad field that includes many types of materials which incorporate long chain structures with many repeated units. One
More informationXAFS Analysis for Calcination Process of Supported Mn Catalysts on Silica
XAFS Analysis for Calcination Process of Supported Mn Catalysts on Silica Kazutaka Furusato, Misaki Katayama, and Yasuhiro Inada Department of Applied Chemistry, Graduate School of Life Sciences, Ritsumeikan
More informationPREPARATION OF MACROPOROUS CELLULOSE-BASED SUPERABSORBENT POLYMER THROUGH THE PRECIPITATION METHOD
PREPARATION OF MACROPOROUS CELLULOSE-BASED SUPERABSORBENT POLYMER THROUGH THE PRECIPITATION METHOD Yu Chen,* Yun-fei Liu, and Hui-min Tan Superabsorbent polymer was prepared by graft polymerization of
More informationCHEMICAL ADMIXTURES FOR CONCRETE
CHEMICAL ADMIXTURES FOR CONCRETE Definition: what are chemical admixtures? The definition of RILEM (International Union of Testing and Research Laboratories for Materials and Structures) is: Admixtures
More informationA Technical Whitepaper Polymer Technology in the Coating Industry. By Donald J. Keehan Advanced Polymer Coatings Avon, Ohio, USA
A Technical Whitepaper Polymer Technology in the Coating Industry By Donald J. Keehan Advanced Polymer Coatings Avon, Ohio, USA INTRODUCTION Polymer Technology in the Coating Industry To properly understand
More informationInnovative. Technologies. Chemie des Klebens Chemistry of Adhesives. Dr. Jochen Stock, Laboratory Manager CRL Germany: Neuss, November 27 th, 2013
Chemie des Klebens Chemistry of Adhesives Dr. Jochen Stock, Laboratory Manager CRL Germany: Neuss, November 27 th, 2013 Innovative Technologies 1 Overview Chemie des Klebens Chemistry of Adhesives Introduction
More informationName Date Class. aryl halides substitution reaction
23.1 INTRODUCTION TO FUNCTIONAL GROUPS Section Review Objectives Explain how organic compounds are classified Identify the IUPAC rules for naming halocarbons Describe how halocarbons can be prepared Vocabulary
More informationINFLUENCE OF AGGREGATE INTERFACE IN CONCRETE ON PERMEABILITY
OS2-4 INFLUENCE OF AGGREGATE INTERFACE IN CONCRETE ON PERMEABILITY Koki Tagomori (1), Takeshi Iyoda (2) (1) Graduate school of Engineering, Shibaura Institute of Technology, Japan (2) Department of Civil
More informationCOMPLEX CARBON-MINERAL SORBENTS FROM COMMON CLAY
1 COMPLEX CARBON-MINERAL SORBENTS FROM COMMON CLAY Authors: S. Cosin 1., C. A. Pinto 2, P. de Souza Santos 1, F.R. Valenzuela Díaz 1. 1) University of São Paulo, Polytechnic School, Materials and Metallurgical
More informationRHEOLOGY AG.02/2005 AG0905
RHEOLOGY Rheology Basics TYPES OF RHEOLOGICAL BEHAVIOUR NEWTONIAN FLOW PSEUDOPLASTICITY SHEAR THINNING FLOW (case with Yield Value) THIXOTROPY Yield Value Viscosity Viscosity Viscosity Shear Rate. Shear
More informationStudy of immobilization mechanism of chloride ion with different concentration of chloride ion using cement with powder admixtures
Study of immobilization mechanism of chloride ion with different concentration of chloride ion using cement with powder admixtures Takeshi IYODA and Yuto KOMIYAMA --, Toyosu Koto-ku, Tokyo, Japan, 88,
More informationNondestructive Monitoring of Setting and Hardening of Portland Cement Mortar with Sonic Methods
Nondestructive Monitoring of Setting and Hardening of Portland Cement Mortar ith Sonic Methods Thomas Voigt, Northestern University, Evanston, USA Surendra P. Shah, Northestern University, Evanston, USA
More informationThermal Methods of Analysis Theory, General Techniques and Applications. Prof. Tarek A. Fayed
Thermal Methods of Analysis Theory, General Techniques and Applications Prof. Tarek A. Fayed 1- General introduction and theory: Thermal analysis (TA) is a group of physical techniques in which the chemical
More informationGRAPHENE BASED POLY(VINYL ALCOHOL) NANOCOMPOSITES: EFFECT OF HUMIDITY CONTENT
THE 19 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS GRAPHENE BASED POLY(VINYL ALCOHOL) NANOCOMPOSITES: EFFECT OF HUMIDITY CONTENT A. Pegoretti 1 *, M. Traina 2 1 Department of Industrial Engineering,
More informationCollected Applications Thermal Analysis EVOLVED GAS ANALYSIS
Collected Applications Thermal Analysis EVOLVED GAS ANALYSIS Preface Over the past decades, the development and characterization of materials has become increasingly specialized due to the ever-increasing
More informationAN INTEGRATED SYSTEM USING TEMPERATURE BASED SAMPLING FOR POLYMER CHARACTERIZATION
AN INTEGRATED SYSTEM USING TEMPERATURE BASED SAMPLING FOR POLYMER CHARACTERIZATION Paper # 164-8P Pittsburgh Conference 24 T. Wampler, C. Zawodny, L. Mancini CDS Analytical, Inc 465 Limestone Road, Oxford,
More informationMODIFICATION WITH A SULFONATE MONOMER
Thesis - MOLECULAR STRUCTURES AND FUNCTIONAL MODIFICATIONS OF POLY(VINYL ALCOHOL) CHAPTER 8 BY TOHEI MORITANI MODIFICATION WITH A SULFONATE MONOMER A functional monomer containing sodium sulfonate group,
More informationSTRUTURAL DURABILITY, DEFORMATION PROPERTIES AND FRACTURE MECHANICS PARAMETERS OF ADVANCED SILICATE MATERIALS
STRUTURAL DURABILITY, DEFORMATION PROPERTIES AND FRACTURE MECHANICS PARAMETERS OF ADVANCED SILICATE MATERIALS E. Shinkevich (1), Y. Zaytsev (2), E. Lutskin (1), G. Bondarenko (3), A. Tymnyak (1) (1) Odessa
More informationPRO LIGNO Vol. 10 N pp
THE MECHANISMS OF MODIFYING AGENTS INTERACTION WITH COMPONENTS OF ADHESIVE COMPOSITIONS OF PVA DISPERSIONS Vasyl SOLONYNKA Assist. Ukrainian National Forestry University, Faculty of Woodworking Technology
More informationLecture 13 Portland Cement Based Paste Systems
Hydration, Porosity and Strength of Cementitious Materials Prof. Sudhir Mishra and Prof. K. V. Harish Department of Civil Engineering Indian Institute of Technology, Kanpur Lecture 13 Portland Cement Based
More informationDESIGN OF POLYMERIC DISPERSANTS FOR LOW AND NO VOC APPLICATIONS
DESIGN OF POLYMERIC DISPERSANTS FOR LOW AND NO VOC APPLICATIONS Jeff Norris, Tom Annable, Matt Dunn, Antonio Lopez Lubrizol Advanced Materials, Inc. USA PIGMENT DISPERSION AND STABILIZATION Polymeric dispersants
More informationPREPARATION OF GF/PVC COMPOSITES USING AQUEOUS SUSPENSION IMPREGNATION TECHNIQUE: THE INTERFACIAL ISSUES
PREPARATION OF GF/PVC COMPOSITES USING AQUEOUS SUSPENSION IMPREGNATION TECHNIQUE: THE INTERFACIAL ISSUES Jiarui XU, Changhai YI, Xiao WANG and Hanmin ZENG Materials Science Institute, PC&FM Lab, Zhongshan
More informationPozzolanic reactions between natural and artificial aggregate and the concrete matrix
2007 World of Coal Ash (WOCA), May 7-10, 2007, Northern Kentucky, USA http://www.flyash.info Pozzolanic reactions between natural and artificial aggregate and the concrete matrix Nambu Masateru 1, Kato
More informationEffect of different molarities of Sodium Hydroxide solution on the Strength of Geopolymer concrete
American Journal of Engineering Research (AJER) e-issn : 23-847 p-issn : 23-936 Volume-4, Issue-3, pp-139-145 www.ajer.org Research Paper Open Access Effect of different molarities of Sodium Hydroxide
More informationSupporting Information. Synthesis of Mg/ Al Layered Double Hydroxides for Adsorptive Removal of. Fluoride from Water: A Mechanistic and Kinetic Study
Supporting Information Synthesis of Mg/ Al Layered Double Hydroxides for Adsorptive Removal of Fluoride from Water: A Mechanistic and Kinetic Study Gautam Kumar Sarma and Md. Harunar Rashid* Department
More informationVINNOL SURFACE COATING RESINS PRODUCT OVERVIEW
SURFACE COATING RESINS PRODUCT OVERVIEW WACKER markets vinyl chloride copolymers and terpolymers under the trade name surface coating resins. The product range currently contains surface coating resins
More informationThermal degradation kinetics of Arylamine-based Polybenzoxazines
U Science Journal 9; 6(S): 3-3 Thermal degradation kinetics of Arylamine-based Polybenzoxazines Sunan Tiptipakorn *, Sarawut Rimdusit, Phiriyatorn Suwanmala 3 and Kasinee Hemvichian 3 Department of Chemistry,
More informationPOSS for Surface Modification and and Corrosion Prevention
PSS for Surface Modification and and Corrosion Prevention Bill einerth Presented at the Nanostructured Chemicals Workshop September 7 th - 8 th, 2000 18237 Mount Baldy Circle Fountain Valley, CA 92708
More informationInternational Journal of Advance Engineering and Research Development
Scientific Journal of Impact Factor (SJIF): 4.72 International Journal of Advance Engineering and Research Development Volume 4, Issue 3, March -2017 e-issn (O): 2348-4470 p-issn (P): 2348-6406 PRODUCTION
More informationSynthesis & Characterization of Vinyl Ester Resins of p-cresol and Tertiary Butyl Phenol
International Journal of hemistry and Applications. ISSN 0974-3111 Volume 4, Number 3 (2012), pp. 175-182 International esearch Publication House http://www.irphouse.com Synthesis & haracterization of
More informationStudy on Solidification Mechanism of Chloride Salt in Base Course. Material of Cement-Fly-ash-Flushed-by-Seawater
Advanced Materials Research Online: 2011-05-12 ISSN: 1662-8985, Vols. 236-238, pp 755-761 doi:10.4028/www.scientific.net/amr.236-238.755 2011 Trans Tech Publications, Switzerland Study on Solidification
More informationA MICROMECHANIC MODEL FOR CHARACTERIZATION OF CEMENT PASTE AT EARLY AGE VALIDATED WITH EXPERIMENTS
A MICROMECHANIC MODEL FOR CHARACTERIZATION OF CEMENT PASTE AT EARLY AGE VALIDATED WITH EXPERIMENTS Guang Ye Delft University of Technology, the Netherlands Zhihui Sun ACBM, Northwestern University, USA
More informationPreparation and Characterization of Hydrogels
Chapter 2 Preparation and Characterization of Hydrogels 2.1 Materials and Methods 2.1.1 Materials 2-Acrylamido-2-methylpropane sulfonic acid (AMPS) was obtained from Vinati Organic Ltd. Acrylamide (AM),
More informationPreparation of Colloidal Sols and Gels
Preparation of Colloidal Sols and Gels Objective This laboratory examines the preparation of silica suspensions and gels by the sol-gel processing of silicate solution under hydrolytic conditions using
More informationMedical University Prof. Dr. Paraskev Stoyanov, Varna, Bulgaria. Technical University, Sofia, Bulgaria
HYDROPHILIZATION OF UNSATURATED POLYESTER RESIN WITH SULFUR, SODIUM HYDROXIDE AND WATER WITH A POSSIBILITY FOR ITS CURING IN THE PRESENCE OF WATER AS A SOLVENT Rumyana Cherkezova 1, Philip Radenkov 2,
More informationCREATING TOMORROW S SOLUTIONS HEAT-SEALABLE COATINGS I PRINTING INKS I INDUSTRIAL COATINGS VINNOL SURFACE COATING RESINS PRODUCT OVERVIEW
CREATING TOMORROW S SOLUTIONS HEAT-SEALABLE COATINGS I PRINTING INKS I INDUSTRIAL COATINGS VINNOL SURFACE COATING RESINS PRODUCT OVERVIEW 1 Viscosity Flexibility Thermal-activation temperature Solubility
More informationParticle Size and Shape Analysis in PHARMACEUTICAL INDUSTRY.
Particle Size and Shape Analysis in PHARMACEUTICAL INDUSTRY Generalities Many analytical methods exist for the characterization of products manufactured in the pharmaceutical industry. Measuring the size
More informationEffect of Natural Zeolite as Partial Replacement of Portland Cement on Concrete Properties
Effect of Natural Zeolite as Partial Replacement of Portland Cement on Concrete Properties Eva Vejmelková 1, Tereza Kulovaná 1, Dana Koňáková 1, Martin Keppert 1, Martin Sedlmajer 2, Robert Černý 1 1 Czech
More informationSynolite 1408-P-1. Product data. DSM Composite Resins
Synolite 8-P- Chemical/physical nature Synolite 8-P- is a low viscous, pre-accelerated, promoted, thixotropic, medium reactive unsaturated polyester resin based on orthophthalic acid. An LSE additive and
More informationDynasylan SIVO 110. Description. Product Information. SIVO SOL Technology for coating systems
Dynasylan SIVO 110 +49-69-218-5656 SIVO SOL Technology for coating systems Description Dynasylan SIVO 110 resembles a multifunctional, basically VOC-free, water-borne sol-gel system. It is composed of
More informationAPPLICATIONS OF THERMAL ANALYSIS IN POLYMER AND COMPOSITES CHARACTERIZATION. Wei Xie TA Instruments
APPLICATIONS OF THERMAL ANALYSIS IN POLYMER AND COMPOSITES CHARACTERIZATION Wei Xie TA Instruments Abstract Thermal Analysis is the generic name for a series of measurement techniques traditionally used
More informationPolymer Systems and Film Formation Mechanisms in High Solids, Powder, and UV Cure Systems
Polymer Systems and Film Formation Mechanisms in High Solids, Powder, and UV Cure Systems J. Baghdachi, Ph.D. Coatings Research Institute Eastern Michigan University (734) 487-3192 Freshpaint@aol.com jamil.baghdachi@emich.edu
More informationInfluence of various acids on the physico mechanical properties of pozzolanic cement mortars
Sādhanā Vol. 32, Part 6, December 2007, pp. 683 691. Printed in India Influence of various acids on the physico mechanical properties of pozzolanic cement mortars STÜRKEL, B FELEKOǦLU and S DULLUÇ Department
More informationSupplementary Information
Supplementary Information Facile preparation of superhydrophobic coating by spraying a fluorinated acrylic random copolymer micelle solution Hui Li, a,b Yunhui Zhao a and Xiaoyan Yuan* a a School of Materials
More informationCH0204 Organic Chemical Technology
CH0204 Organic Chemical Technology Lecture 10 Chapter 3 Plas2cs Assistant Professor (OG) Department of Chemical Engineering 1 Overview of topics Chapter 3 Plas2cs 1 2 3 Polymers, Plas2cs, and Resins Produc2on
More informationHealth Monitoring of Early Age Concrete
1 Health Monitoring of Early Age Concrete Surendra P. Shah Northwestern University, Illinois, USA Keynote CONSEC 04, Seoul, June 30, 2004. 2 Scope of Research Test method for in-situ testing of early age
More informationTHE EFFECT OF HYDROPHOBIZATION ON THE PROPERTIES OF FGD GYPSUM
THE EFFECT OF HYDROPHOBIZATION ON THE PROPERTIES OF FGD GYPSUM Pavel Tesárek 1, Pavla Rovnaníková 2, Jiří Kolísko 3, Robert Černý 1 1 Czech Technical University, Faculty of Civil Engineering, Department
More informationTitle Heterogeneous Mixture of Metals and Initiator for Vinl Polymerization Author(s) Furukawa, Junji; Fueno, Takayuki Citation Bulletin of the Institute for Chemi University (1959), 37(4): 260-266 Issue
More informationHome, Institutional and Personal Care Solutions. ACUSOL Dispersant Polymers for Household Products and Industrial & Institutional Cleaners
Home, Institutional and Personal Care Solutions Dispersant Polymers for Household Products and Industrial & Institutional Cleaners Why choose dispersant polymers Demands are ever increasing for detergent
More informationPickering emulsion engineering: Fabrication of materials with multiple cavities
Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 014 Electronic Supplementary Infomaton Pickering emulsion engineering: Fabrication of materials
More informationHYPHENATED TECHNOLOGY GUIDE
HYPHENATED TECHNOLOGY GUIDE TABLE OF CONTENTS TG-IR...3 Hiden Analytical MS Systems for TG-MS...4 TG-MS...5 TG-GC/MS...6 TG-IR-GC/MS...8 HYPHENATED TECHNOLOGY GUIDE Coupling, or hyphenating, two instruments
More informationCarbon nanotube coated snowman-like particles and their electro-responsive characteristics. Ke Zhang, Ying Dan Liu and Hyoung Jin Choi
Supporting Information: Carbon nanotube coated snowman-like particles and their electro-responsive characteristics Ke Zhang, Ying Dan Liu and Hyoung Jin Choi Experimental Section 1.1 Materials The MWNT
More information4 th Historic Mortars Conference HMC2016
Laboratory of of of Building Materials Department of of Civil Engineering Aristotle University of of Thessaloniki Proceedings of the HMC2016 10 th -12 th October 2016, Santorini, Greece Editors Ioanna
More informationProduct Bulletin. SMA Multi-Functional Resins
Product Bulletin SMA Multi-Functional Resins TABLE OF CONTENTS INTRODUCTION... 4 CRAY VALLEY S STYRENE MALEIC ANHYDRIDE RESINS......5-6 PROPERTIES OF STYRENE MALEIC ANHYDRIDE RESINS... 7-11 REACTIONS
More informationTwo Dimensional Graphene/SnS 2 Hybrids with Superior Rate Capability for Lithium ion Storage
Electronic Supplementary Information Two Dimensional Graphene/SnS 2 Hybrids with Superior Rate Capability for Lithium ion Storage Bin Luo, a Yan Fang, a Bin Wang, a Jisheng Zhou, b Huaihe Song, b and Linjie
More informationScience and technology of concrete admixtures / edited by Pierre-Claude Aïtcin and Robert J. Flatt. Amsterdam [etc.], cop
Science and technology of concrete admixtures / edited by Pierre-Claude Aïtcin and Robert J. Flatt. Amsterdam [etc.], cop. 2016 Spis treści About the contributors Woodhead Publishing Series in Civil and
More informationEffect of Polyacramide as Drilling Fluid in Kuttanadu Soil
Effect of Polyacramide as Drilling Fluid in Kuttanadu Soil JayaV, Syam N. Professor, Department of Civil Engineering, GECBH, Thiruvannathapuram, Kerala, India Junior Engineer (Civil), Dam Safety Wing,
More informationEffect of curing time on phenolic resins using latent acid catalyst
International Journal of ChemTech Research CODEN (USA): IJCRGG ISSN: 0974-4290 Vol.9, No.01 pp 30-37, 2016 Effect of curing time on phenolic resins using latent acid catalyst G.N.Manikandan*, K.Bogeshwaran
More informationSynthesis of hydrophilic monomer, 1,4-dibromo-2,5-di[4-(2,2- dimethylpropoxysulfonyl)phenyl]butoxybenzene (Scheme 1).
Supporting Information Materials. Hydroquinone, potassium carbonate, pyridine, tetrahydrofuran (THF for organic synthesis) were purchased from Wako Pure Chemical Industries Ltd and used as received. Chlorosulfuric
More informationSynthesis of A Novel Polycarboxylate Superplasticizer with High Performance
Asian Journal of Chemistry; Vol. 23, No. 5 (211), 2276-228 Synthesis of A Novel Polycarboxylate Superplasticizer with High Performance KELI ZHOU 1, JIN LIU 1,2,* and ZHEN LI 1 1 School of Materials Science
More informationHYPHENATED TECHNOLOGY GUIDE
HYPHENATED TECHNOLOGY GUIDE TABLE OF CONTENTS TG-IR...3 Hiden Analytical MS Systems for TG-MS...4 TG-MS...5 TG-GC/MS...6 TG-IR-GC/MS...8 HYPHENATED TECHNOLOGY GUIDE Coupling, or hyphenating, two instruments
More informationKURARAY POVAL, EXCEVAL & ELVANOL Resins
KURARAY POVAL, EXCEVAL & ELVANOL Resins Grade List for North and South America Characteristics: Polyvinyl alcohol (PVOH) has varying degrees of polymerization and hydrolysis. Recommended use: The characteristics
More information2 1 Colloids in Paints
1 1 Colloids in Paints Paints or surface coatings are complex, multi-phase, colloidal systems that are applied as a continuous layer to a surface [1]. A paint usually contains pigmented materials to distinguish
More informationCARBON NANOTUBES AS A NEW REINFORCEMENT MATERIAL FOR MODERN CEMENT-BASED BINDERS
CARBON NANOTUBES AS A NEW REINFORCEMENT MATERIAL FOR MODERN CEMENT-BASED BINDERS Xin Jiang (1), Torsten L. Kowald (2), Thorsten Staedler (1) and Reinhard H. F. Trettin (2) (1) Institute of Materials Engineering,
More informationCELLOSIZE HYDROXYETHYL CELLULOSE For Emulsion Polymerization. Emulsion Polymerization
CELLSIZE HYDRXYETHYL CELLULSE For Emulsion Polymerization Emulsion Polymerization Contents Table of Contents 3 4 5 5 6 10 11 12 15 16 16 17 25 25 Introduction Latex types Latex manufacturing techniques
More informationEvaluation of Influence of Salt in the Cement Hydration to Oil Wells
Materials Research. 2017; 20(Suppl. 2): 743-747 DOI: http://dx.doi.org/10.1590/1980-5373-mr-2017-0049 Evaluation of Influence of Salt in the Cement Hydration to Oil Wells Fernanda Rodrigues Lago a, Jardel
More informationThe Role of Thickeners in Optimising Coatings Formulation
The Role of Thickeners in Optimising Coatings Formulation Clemens Auschra, Immanuel Willerich, Iván García Romero, Hunter He, Robert Reichardt, Cindy Muenzenberg, Elena Martinez ChinaCoat, December 2014
More informationMulti-scale Study of Calcium Leaching in Cement Pastes with Silica Nanoparticles
Multi-scale Study of Calcium Leaching in Cement Pastes with Silica Nanoparticles J.J. Gaitero, W. Zhu, and I. Campillo * Abstract. Calcium leaching is a degradation process consisting in the progressive
More information